Why is it that if you download Git 2.0 from the Internet, you always get a 1.9.4 installer package? Why can't you just find a Git installer package on the Internet anywhere that is not only labeled 2.0+, but the installation archive you download is also labeled as such?
For example: This 2.1.3 site takes you to this 1.9.4 site download.
Git for Windows is msysgit project. The latest version of this project is 1.9.4 so Git is also 1.9.4 in it. This is official Git installer for Windows.
Also there is a note on download page:
The current source code release is version 2.1.3. If you want the newer version, you can build it from the source code.
So you can build Git 2+ on Windows by yourself.